Ignition coil for combustion motors



Feb. 21, 1928. 1,659,596

0. FISCHER ET AL IGNITION COIL FOR COMBUSTION MOTORS Filed April 12. 1926 Fig. 2

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Patented Feb. 21, 1928. 1,659,596

UNITED STATES PATENT orrlcs.

OTTO FISCHER zAND WILHELM WALTHER, OF STUTTGART, GERMANY, ASSIGNORS TO ROBERT BOSCH AKTIENGESELLSOHAFT, OF STUTTGAR'I, GERMANY.-

vItGlIIZlIi'JKI COIL FOR COMBUSTION MOTORS. Application filed April 12, 1926, Serial No. 101,478, and in Germany June 4, 1925.

'lhisinvention relates to ignition coils for coil ,to the motor-and for this purpose has combustion motors, especially that kind of holes f for the fastening screws. The coil ignition coils, which have an enclosed magis enclosed by a casing g, which is held in netic circuit and a removable protective casposition by screws in, engaging with the ex- 5 ing. The purpose of the invention is t tended nut threads of the bolts 0.

arrange the coil on that part of'the vehicle, The ring or yoke k, which is formed of designated for this purpose,-in such a manlaminated iron, is' flanged or seated in the ner, that the coil can be uncovered to gain casing g by first making the upper part of access thereto by-merely slipping orremovthe-said casing of the same diameter as that 10 ing the casingorhousing thereof from the of the middle portion 2', then slipping the coll without such removal being obstructed ring or yoke down into the upper enlarged or hindered in any way by the transformer portion until it rests on the lower shoulder on yoke. I a thereof, and thereupon spinning or drawing This purpose is eliec'ted, according to the the upper portion of the casing above the invention, by arranging the parts so that the" ring by suitable and well known tools and winding is s"upported by t 0 iron," core of. appliances so as to contract the same above the ignition coil, such'core being, suspended the ring and thus hold the same in place,

from the casing holder, while the transwithout requiring any further fastening former yoke is secured to the coilcaSing.- means. J

20 In the accompanying drawing, in which On the holderd a binding screw m for at one form of construction oil-our improved taching the interrupter to the one end of the ignition coil is illustrated, i primary winding is secured, while the other ig. 1 shows a longitudinal section end of said primary winding is attached to a through an ignition coil, the wiring diagram binding screw a. To the latter is connected being indicated by thin lines. 1 also one end of the starting resistance 0 for Fig. 2 is a side elevation and the primary coil, while the other end of said Fig. 3 a plan view of the ignition coil and reslstance is connected to a binding screw r,

Fig. 4 is' a. cross section on the line AB to which also the source of current is conof Fig. 1. nected. One end of the secondary winding 30 In the drawing our invention is shown in is connected to the primary winding while connection with an ignition device such as its other end is connected with a contact p,

set forth and claimed in application N o. 35,- which is in engagement with abinding screw 798, filed June 8, 1925, 'by Erich Klaiber, or stud q on the bottom of the casing.

and which consists in an iron core Z) provided As it may be seen from the drawing, the

at its ends with enlargements or shoes 6, so coil and its connections may be inspected and as to be practically H-shaped as seen best in examined after the removal of the casing,

Fig. 4, the outer faces of the enlargements or without the examining person being impeded shoes I) are on arcs of the same clrcle. The by the iron yoke. Nevertheless the coil can path for "the magnetic lines of force issuing be made again operative by simply replacing at the shoes is closed by an iron ring or yoke 4 the casing in its position.

concentric with the faces of the shoes 6', The iron yoke It can be fastened in the leaving an air-gap it between the two shoes casing'instead of edging the yoke into the b, on the one hand, and the ring or yoke h, casing also by indentations of the casing on the other. above and below said yoke, said indentations 45 A The winding a of the ignition coil is arservmg to hold the yoke in position.

' ranged on a core 6, whlch is supported V Obviously the holder or cover (2 of the coil bolts 0', which on the one hand engage with may be fastened to the motor also in any the ends or shoes b of the core 6, projectother. known manner, for instance it can be mg from the winding (1 and on the other made approximately round and can be held 50 and are secured to a holder d, which conon the motor by a spring tape.

" stitutes a cover for the casingg described be- We claim low. The latter is provided with an exten- 1. An ignition device for combustion mosion e, which' serves for securing the ignition tors,comprising in combination a removable ;said casing,

protective -casing, an iron yoke 'secured to a cover for the casing, an 1ron "core, supported by said cover and adapted of the same,

to receive the Winding of the ignition coil, said casing and yoke being of such interior dimensions as to clear the other parts of the ignition device, whereby, after the removal an inspection and examination of the coil can be made Without being impeded by the iron yoke.

.2. An ignition device for combustion mo-, combination a removable.

tors,,comprising in protective casing, an iron yoke secured to said casing by a recess in the wall of said casing, a cover for said'casing, an iron core,

supported by said cover and adapted to reccive the winding of the ignition coil, sal

. casing and yoke being of such interior di-' mensions as to clear the other parts of the ignition device, whereby, after the removal of the same, an inspectlon and examination peded by the iron yoke. c

3. An ignition device for combustion motors, comprising in combination a removable protective casing,.an iron yoke secured to means seated in the Wall of said casing by said casing, a cover for the casing for se-' curing the coil to the motor, an iron core,

supported by said cover and adapted to receive the Winding of the ignition coil, said casing and yoke OTTO FISCHER.

.WI'LHELM WALTHER.

we have hereunto of the coil can be made without being im- 7 being of such interior di- I :mensions as to clear the other parts of the after the removal 

